HP-IF-EXT-MIB

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Organization: Hewlett Packard Company, ProCurve Networking Business

Last Updated: 2005-02-01

Category: Network Interfaces, Vendor: HP/HPE

Description: HP SNMP MIB extending standard IF-MIB with additional interface statistics and configuration objects for HP networking devices.

Start monitoring vendor-neutral, standards-based MIB, any SNMPv3-capable network device (SNMP engine identity/boot/clock status) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

What Is HP-IF-EXT-MIB?

HP-IF-EXT-MIB extends the standard IF-MIB with additional Hewlett-Packard-specific interface objects for HP ProCurve networking devices, notably wireless-related interface statistics. It exposes per-interface data such as client counts and roaming statistics, layered on top of the base interface table's link/operational status. Its monitoring focus spans both general interface (software) health and, for wireless interfaces, client-session behavior — the number of associated clients and how often they roam between and within access points/controllers, which reveals wireless coverage or handoff problems. It explicitly extends the standard IETF IF-MIB, reusing ifIndex-based indexing (hpifStatsSlot/hpifStatsPort map to physical interface identity) to attach HP-specific counters. It is deployed on HP ProCurve wired and wireless networking equipment, particularly where wireless client roaming behavior needs to be tracked alongside standard interface counters, and HP-IF-EXT-MIB SNMP monitoring is how administrators surface that roaming and client-count data.

IPNetwork Monitor allows you to monitor SNMP objects defined in HP-IF-EXT-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

HP ProCurve networking/wireless device

Monitoring Examples

An administrator can poll hpifStatsTable/hpifStatsEntry for hpifStatsNumClients to see how many wireless clients are currently associated on a given slot/port, and watch hpifStatsExtRoamsTo/hpifStatsExtRoamsFrom together with hpifStatsIntRoamsTo/hpifStatsIntRoamsFrom to detect excessive external or internal roaming events, which can indicate weak RF coverage or a flapping access point. A sudden drop in hpifStatsNumSessions alongside a spike in roam counters would point to clients being repeatedly dropped and re-associating.

What Can Be Monitored

wireless client count per interface
external roam events
internal roam events
active session count
interface slot/port identity

Imported Objects

From HP-BASE-MIB

hpProcurveCommon

OBJECT-IDENTITY

From IF-MIB

ifEntry	OBJECT-TYPE
ifIndex	OBJECT-TYPE

From SNMPv2-CONF

MODULE-COMPLIANCE
NOTIFICATION-GROUP
OBJECT-GROUP

From SNMPv2-SMI

Counter32
Gauge32
MODULE-IDENTITY
NOTIFICATION-TYPE
OBJECT-TYPE
Unsigned32

From SNMPv2-TC

TEXTUAL-CONVENTION
TruthValue

How to Use in IPNetwork Monitor

Example using hpifStatsExtRoamsTo OID:

Select an HP ProCurve networking/wireless device (interface extensions, roaming stats) as the target host to create a monitor — the SNMP service should be up and running on it. Click New Monitor, then check SNMP Custom on the Favorites tab, click Next, and confirm the host. On the next page, click Select... to open the built-in SNMP MIB Browser and type hpifStatsExtRoamsTo into the Find box to locate it in the OID tree, selecting the specific row/instance you want to monitor since this is a table column, then select it and click OK. The number of clients which have roamed to this interface from another HP J8162A XL Access Controller Module since the last reboot of this HP J8162A XL Access Controller Module or similar device. On the monitor's Main parameters page you can set the target's SNMP port (default 161), credentials, polling interval, and other settings — see the SNMP Monitor help for details. On the State conditions and Alerting tabs, configure when the monitor should change state and trigger an alert; since this is a Counter32-type OID, Value bounds is the most useful condition here — trigger an alert if the counter increases sharply between polls relative to its normal baseline, since an unexpected spike often reflects a real change in traffic or activity. Click Finish to create the monitor; you can adjust any parameter later.

OIDs

OID symbolic	OID numeric	Type	Access	Description
hpIfExtMIB	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2			Extensions to IF-MIB for HP Procurve product line.
hpifMIBObjects	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1
hpifStats	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1
hpifStatsTable	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1		not-accessible	Per interface aggregated statistics for each port on this device. This table relates primarily to HP J8162A XL Access Controller Module and similar devices.
hpifStatsEntry	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1.1		not-accessible	An entry containing management statistics applicable to a particular interface on an HP J8162A XL Access Controller Module or similar device.
U32 hpifStatsSlot	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1.1.1	Unsigned32	read-only	This object contains the slot designation for this interface on the associated HP J8162A XL Access Controller Module or similar device.
U32 hpifStatsPort	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1.1.2	Unsigned32	read-only	This object contains the port designation for this interface in the slot reported by hpifStatsSlot on the associated HP J8162A XL Access Controller Module or similar device.
G32 hpifStatsNumClients	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1.1.3	Gauge32	read-only	This object contains the number of active clients associated with this interface on this HP J8162A XL Access Controller Module or similar device. This number will vary as clients roam, log on or off.
C32 hpifStatsExtRoamsToEx	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1.1.4	Counter32	read-only	The number of clients which have roamed to this interface from another HP J8162A XL Access Controller Module since the last reboot of this HP J8162A XL Access Controller Module or similar device. External roams may indicate client traffic is being tunneled back through the original HP J8162A XL Access Controller Module.
C32 hpifStatsExtRoamsFrom	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1.1.5	Counter32	read-only	The number of clients which have roamed away from this interface to another external HP J8162A XL Access Controller Module since the last reboot of the HP J8162A XL Access Controller Module or similar device. External roams may indicate client traffic is being tunneled back through the original HP J8162A XL Access Controller Module.
C32 hpifStatsIntRoamsTo	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1.1.6	Counter32	read-only	The number of clients which have roamed to this interface from another interface on this same HP J8162A XL Access Controller Module since the last reboot of the HP J8162A XL Access Controller Module or similar device.
C32 hpifStatsIntRoamsFrom	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1.1.7	Counter32	read-only	The number of clients which have roamed away from this interface to another interface on this same HP J8162A XL Access Controller Module since the last reboot of the HP J8162A XL Access Controller Module or similar device.
G32 hpifStatsNumSessions	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.1.1.1.8	Gauge32	read-only	The number of active sessions aggregated over all clients associated with this interface on this HP J8162A XL Access Controller Module or similar device.
hpifNotificationConfig	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.1.3
hpifExtMIBNotificationsPrefix	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.2
hpifExtMIBNotifications	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.2.0
hpIfExtMIBConformance	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.3
hpifCompliances	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.3.1
hpifExtMIBCompliance1	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.3.1.1			The compliance statement for entities which implement the HP-IF-EXT-MIB.
hpifGroups	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.3.2
hpifStatsGroup	1.3.6.1.4.1.11.2.3.7.11.17.7.1.2.3.2.1			A collection of objects providing statistics applicable to all HP J8162A XL Access Controller Module like devices.

RFC description

Extends interface statistics for HP ProCurve access controllers with client roaming and session tracking.

Start monitoring HP ProCurve networking/wireless device (interface extensions, roaming stats) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download HP-IF-EXT-MIB